The D-Link USB Bluetooth Adapter for the PowerBook arrived this morning. As was expected, everything went off without a hitch. Plugged it in, told it to search for "mobile phone," put my T68i in discoverable mode and then paired the devices. iSync was a breeze — after the devices were paired I simply told it to sync and it began moving all of my stuff over.
When I get a chance I'm going to start messing around with some of the nerdier things.